Getting it into your agent
This one installs as part of its plugin. Adding the marketplace and installing the plugin brings it with everything else the plugin ships.
/plugin marketplace add yarikleto/claude-teacher-plugin/plugin install claude-teacherWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/yarikleto/claude-teacher-plugin/init-edu)<a href="https://agentmods.dev/skills/yarikleto/claude-teacher-plugin/init-edu"><img src="https://agentmods.dev/badge/skills/yarikleto/claude-teacher-plugin/init-edu/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/yarikleto/claude-teacher-plugin/init-edu"><img src="https://agentmods.dev/badge/skills/yarikleto/claude-teacher-plugin/init-edu.svg" alt="Reviewed on agentmods" width="80" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00028 | $0.01525 |
| Opus 5 | $0.00014 | $0.00763 |
| Sonnet 5 | $0.00006 | $0.00305 |
| Haiku 4.5 | $0.00003 | $0.00153 |
Grade A, and why
init-edu scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured yesterday.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 135 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Initialize Educational Environment
Before accessing education data, read ${CLAUDE_PLUGIN_ROOT}/references/education-data.md. Resolve <education-db> using that contract. Current session ID: ${CLAUDE_SESSION_ID}.
1. Inspect before changing files
Read the project CLAUDE.md, .claude/CLAUDE.md, .claude/settings.json, .claude/claude-teacher.json, and existing <education-db>/student.json and dashboard.json, when present.
- Preserve all unrelated instructions, settings, hooks, and student work. If a JSON file is invalid, report it and recover it before updating.
- Do not write setup files until the student has supplied the required onboarding and project answers. Honor supplied answers; do not ask again.
- If a profile exists, greet the student and ask whether to set up this project using it or update selected profile fields. Never delete the profile to edit it.
- If they want a full reset, direct them to
/claude-teacher:reset-edu. Do not invoke or reproduce that manual-only skill automatically.
2. Onboard a new student
Ask one question at a time and wait for the answer. The student may skip personal questions; save unknown values as null or empty arrays. Do not require an age or infer one.
- What should I call you?
- How old are you, or would you prefer to skip that?
- What is your current level: beginner, some experience, intermediate, or advanced?
- What subjects or skills do you already know well?
- Which learning approaches do you prefer: diagrams, examples first, analogies, theory first, hands-on practice, or a mix?
- What frustrates you when learning?
- What are your goals and any deadlines?
- What interests or hobbies could I use for examples?
- How would you describe your ideal teacher's tone and approach?
Save an object in <education-db>/student.json after collecting the answers:
{
"name": "preferred name",
"age": null,
"level": "beginner",
"known_subjects": [],
"learning_style": [],
"frustrations": [],
"goals": [{"goal": "student's goal", "deadline": null}],
"interests": [],
"teacher_persona": "student's own description"
}
What ships with it
1 file beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- yesterday Changed · -220 lines · -17 tokens per session 3f36081c23a6
- 9d ago First seen · 355 lines · 45 tokens per session scan A 495731a009ac
init-edu is a skill published in the GitHub repository yarikleto/claude-teacher-plugin (8 stars, last pushed 3d ago), licensed MIT. It adds 28 tokens to every session and 1,525 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
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